The Lan Yaguo police immediately sent top criminal investigation experts to the scene to investigate.

Through bullet hole analysis, the murder weapon used by the murderer was a 9mm revolver carried by Professor Li Changyi, and after the police investigation at the scene, Lin Yuhan, who lived in the same house, was suspected of committing a major crime.

Because there were no fingerprints and footprints of any other people in the house, Li Changyi's pistol was left next to the bed, with only the fingerprints of Li Changyi and Lin Yuhan on it, and the doors and windows in the house were intact without any traces of being pried.

And, the surrounding surveillance showed that there were no other suspicious people entering their room.

Therefore, the murderer can only be Lin Yuhan.

Otherwise, it's a murder case in a locked room with its clever design.

However, after repeated reasoning by the police, most people believe that the possibility of murder in a closed room is unlikely.

If it is a closed room murder case, why did the murderer disappear as if he had not entered this room, not only did there be no trace of the scene, but even the surveillance did not photograph it, this is also incredible.

Moreover, the crux of the matter is that Lin Yuhan was in the house when Professor Li was killed, so he didn't feel it at all.

Therefore, Lin Yuhan naturally became the first suspect.

However, on the issue of dealing with Lin Yuhan, the prosecution formed two strong disagreements.

Those who support Lin Yuhan's guilt believe that the chain of evidence at the scene is complete, there is no trace of outsiders' invasion, and the murderer of Li Changyi can only be Lin Yuhan.

However, opponents also put forward several points that are strong for Lin Yuhan.

First of all, Lin Yuhan did not have any motive for committing the crime, and in handling criminal cases, the motive for committing the crime is very important. And Lin Yuhan has always been excellent in character and learning in school, it is impossible to kill Li Changyi, it makes no sense emotionally.

Secondly, Lin Yuhan lives with Professor Li Changyi, and his fingerprints on the pistol are also normal, which cannot be used as direct evidence for conviction. At that time, the technical conditions were limited, and it was not possible to determine whether the surveillance video of the surrounding road section had been edited.

Moreover, the person who called the police was Lin Yuhan, who found Li Changyi's body after getting up in the morning. According to his knowledge and ability, if he shot Li Changyi, he would definitely dispose of the fingerprints on the pistol if he wanted to evade responsibility, but he did not do so, so this case needs to be investigated.

The most important thing is that Lin Yuhan never pleaded guilty.

He insisted that he was innocent, and that he knew nothing about Li Changyi's death because he fell asleep that night.

When he woke up the next day, Professor Li Changyi had been brutally killed.

Later, the case was suppressed by an invisible force.

After a careful decision by the "relevant departments", Lin Yuhan was released due to insufficient evidence.

However, due to his work mistakes and serious suspicions, he was dismissed from all positions during his internship and all honors received during his time at the university, and only his student status was retained.

If it weren't for the efforts of many parties to not let this genius boy fall, I'm afraid Lin Yuhan would have been expelled from school a long time ago.

It is already a miracle to be able to graduate successfully.

The investigation of the transnational criminal group was also suspended because of this incident. All the files were sealed.

However, Lin Yuhan still clearly remembered that in the previous investigation, this special symbol similar to lightning repeatedly appeared in Li Changyi's information.

When he inspected Li Changyi's body, the palm of his left hand also had the same mark written on blood stains.

What does this represent, implying the murderer, an important clue left by Li Changyi for himself?

Let yourself inherit the will and continue to investigate this case.

It's a pity that time flies, time flies, and ten years have passed, and neither of these two things has been done.

Li Changyi's death has always been a mystery.

The killer was not caught, and the criminal syndicate remained at large.

Lin Yuhan has also moved from a high-spirited teenager to a middle-aged uncle.

Having lost his aura, he quickly declined.

He obtained his detective certificate and became a private detective.

In Lanyaguo, private detectives are not officially recognized, and detective certificates only mean that you have relevant professional abilities.

He has been secretly investigating the case of ten years ago, but he has been blocked everywhere and found nothing, until he finally has no food to eat and is destitute.

Could it be that they have reappeared?

They came back, for what.

Let them pay with blood! Lin Yu's cold eyes burned into a scorching fire!

The scenery in front of him quickly pulled back to reality, and the domineering and mighty Land Rover was running wildly on the road.

Wu Hao said to himself: "I went to Zhudao District to investigate a case that day, and I just happened to see this man, so I took a photo of him, and then quietly followed him, but unfortunately I lost it, this person may have also found me, and the other person disappeared in the blink of an eye." ”

Lin Yuhan stared at the photo in his hand and asked, "How do you know this symbol?" You didn't take on the case from 10 years ago. At that time, this was a confidential document, and only my master and I knew about it. ”

Wu Hao's face showed a wry smile, the corners of his mouth raised an unruly expression, and he still said in that cynical tone: "Although I don't like school, my character is not good." I know you have a lot of opinions about me, but Professor Li is the person I respect the most and the only idol I have since I went to university. ”

"I didn't expect that there was such a relationship between you and your master," Lin Yuhan was quite surprised, "Professor Li is so strict in accepting apprentices, he can't take a fancy to you." ”

"Of course not!" Wu Hao was rarely humble, "In terms of learning, I am indeed inferior to you." However, I have some unknown personal friendship with Professor Li, so I won't go into detail with you. But I can tell you that if it weren't for him, I'm afraid I would have dropped out of the police academy a long time ago. His death has always been a heartache for me, so I played a trick and secretly checked the files of that year to find out that there was such a thing. Only then did I know that you may be the murderer of Professor Li Changyi. ”

"So what?" Lin Yuhan asked expressionlessly.

"I want to kill you." Wu Hao told the truth.

"Kill me? Revenge for Professor Lee? Lin Yuhan's mouth showed a mocking tone, "You also think that I killed Professor Li?" ”

"So far." Wu Hao didn't hide the hatred in his eyes at all, "Even if you are not a murderer, you didn't even know anything when the professor was killed, you didn't even go to save him, and you couldn't even provide any clues to the police, so it was in vain that he was so good to you!" You're useless, you damn it! ”

yes, I'm damned!

Lin Yuhan fell into deep self-blame.

He was also very saddened by the death of Professor Li Changyi, who was once a righteous and amiable professor, and was also his idol and life mentor.

He has hallucinated countless times to become a person like Professor Li Changyi.

The moment he received the notice, he walked into Li Changyi's door with such excitement and trembling and became his disciple.

However, it was such a respected professor who was killed.

Right under your nose.

Perhaps, it was really he who killed Professor Li Changyi.

He had a secret that he hadn't told anyone.

He deserves to die!